Niphon is a very professional host and this is my second time I stay in one of his apartments. The pool is nice and with a good view, the room has what it needs and the extra bed is very nice too. We asked for a top mattress to make it extra comfortable and got it the same day.
Most of the gym is a poor condition though, so don't count on that, do your exercise in the pool.
You will be provided by all the necessary useful information in an welcoming letter from Niphon.